Step 3: Enter your full question details here I need help on this one physics pr

Question

Step 3: Enter your full question details here I need help on this one physics problem. It has 3 parts to it. A golf ball is thrown straight up from the top of a building 50 meters high. The initial speed of the golf ball 20 meters/second and just misses the the edge of the roof when it eventually falls. Neglecting Air Resistance, find A. The time needed for the golf ball to reach its maximum height. B. The time needed for the golf ball to return to the height in which it was initially thrown. C. The velocity of the golf ball just at the instant it hits the ground.
Step 3: Enter your full question details here I need help on this one physics problem. It has 3 parts to it. A golf ball is thrown straight up from the top of a building 50 meters high. The initial speed of the golf ball 20 meters/second and just misses the the edge of the roof when it eventually falls. Neglecting Air Resistance, find A. The time needed for the golf ball to reach its maximum height. B. The time needed for the golf ball to return to the height in which it was initially thrown. C. The velocity of the golf ball just at the instant it hits the ground.

Explanation / Answer

Given Height , h = 50 m Initial speed, vi = 20 m/s A.The time to reach maximum height is     t = vi/g        = 20 m/s/9.8 m/s^2         = 2.04 s B.Time of flight is    T = 2vi/g       = 2 * 2.04 s       = 4.08 s C.Since v^2 - vi^2 = 2gh          v^2 - (20 m/s)^2 = 2*9.8 m/s^2 *50 m          v = 37.15 m/s is the velocity at the instant it hits the ground

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